Since this thread has taken a direction of "what does or doesn't belong in this Professional Class", let me ask why limosines (especially those w/ divider winders) are not considered for this class? Most would have been driven by a paid driver as hearses, ambulances, taxis, etc. Many were completed by an outside coachbuilder. To me this puts them in the same vein as hearses and such. The Professional Car Society includes them. I remember the Fall Meet of 2011 included a 1968 Caddy Limo in 27-H, hardly your average production vehicle.
Personally, I don't see the real connection between funeral vehicles and and taxi/police vehicles. Better mix would be funeral/limo in one group and municipal vehicles (taxi, police, ambulance) as another group.